<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id = 'app'>
        <h2>{{message}}</h2> 

        <h1>{{getFullname}}</h1>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el:'#app',
            data:{
                message:'你好啊',
                firstName:'kobe',
                lastName:'bryant',
            },
            computed:{
                getFullname(){
                    return this.firstName + '' + this.lastName
                }
            }
        })
    </script>
</body>
</html>